TrustedReviews has posted Super-Multi DVD Writer Roundup:

BenQ DW1670: DVD-RW was a bit of a mixed bag. While all the write tests were suitably fast, at and around the 10 minute mark, the DW1670 took over 15 minutes to format a disc. DVD-RAM performance was the best on test, but the rest of the numbers were pretty average across the board. In the box you'll find the drive, the second face plate, mounting screws and Nero OEM suite to get you going straight away. The lack of an IDE cable is somewhat annoying when you're paying a premium for a retail box, but BenQ isn't the only company to do this.

Pioneer DVR-111: It was the dual layer performance that really impressed with the Pioneer. Performing the 7.9GB burn of a large MPEG and ISO file, the DVR-111 completed the test in an amazing eight minutes and five seconds. Although the 8.1GB of mixed image files took around double that time, it's still a pretty good result. The same two tests using DVD-R DL media took 17 minutes 37 seconds and 17 minutes 24 seconds respectively – very good results for this media. DVD-R and DVD+R results were par for the course, as were the DVD+RW scores. However, the DVD-RW results were very good, with every single test completed in under 10 and a half minutes. CD-R performance wasn't the best around, but the CD-RW results were above average. Finally, DVD-RAM performance was average, but considering the outstanding results seen elsewhere, this is easily forgiven. The only thing really missing from the DVR-111 is some kind of disc labelling support in the form of LightScribe or LabelFlash, but unless you are desperate for "in drive" labelling, you shouldn't let this put you off an otherwise excellent drive.

Sony DWG-120A: The DVD-RW results are pretty good, although no better than the Pioneer, while CD-R performance was also impressive. CD-RW times on the other hand let things down once more though, and DVD-RAM performance was pretty average compared to the competition. The Sony DWG-120A isn't a bad drive by any means, and the price is very attractive. Unfortunately, Pioneer has created a drive that's far faster than this Sony at roughly the same price, which makes life very difficult for the DWG-120A.